Double-acting force-pump



. HOPKINS.

(NoModeL) A J Double Acting Force Pump No. 240,131. Pat ente d April 12,1881.

ATTORNEYS.

y WITNESSES:

INGTOH, o c.

NPEI'ERS, PHoTO-LITMOGRAPHER, WASH UNITED STATES PATENT OFFICE.

ANDREW J. HOPKINS, OF RICHMOND, INDIANA. i

DOUBLE-ACTING FORCE-PUMP.

SPECIFICATION forming part of Letters Patent No. 240,131, dated April 12, 1881.

Application filed January 18, 1881. (No model.)

To all whom it may concern:

Be it known that I, ANDREW J OSLIN HoP- KINs, a citizen of the United States, residing at Richmond, in the county of Wayne and State of Indiana, have invented a new and useful Single-Cylinder, Double-Acting, Non- Freezing Force-Pump, of which the following is a full, clear, and exact description, reference being had to the drawings hereto anneXed.

My invention relates to submerged forcepumps in which a single double-acting cylinder is used; and theobject ofmyimprovements is to provide a pump which shall be simple and efiicient in its action, and at the same time so constructed as to avoid the inconveniences incident to freezing, as hereinafter described.

. In the accompanying drawings, Figure 1 is a side elevation of my pump, partly in section; and Fig. 2 is an inside view of one of the bearing-plates of the lever.

The cylinder A of the pump is cast in one piece with the side pipe, B, and coated with porcelain to produce a smooth anti-frictional surface and prevent rusting. The cylinder is cast open at both ends, with annular flanges to which to bolt the top and bottom valved cylinder-heads, O 0, both of which are circular. The side pipe, B, is offset from the cylin-v der A, so as to leave an open space between them. The lower end of the side pipe branches from the side of the cylinder with an upward curve a, whereby the flow 0f the water through said side pipe will befreet'rom angular obstru ction. The cylinder-head C will then be of a true circle, and thus make the cylinder less expensive in construction.

The side pipe, B, terminates in a valve-chamber, D, cast on outside of cylinder A, which has a throat, d, communicating with the cylinder. The top of the valve-chamber is closed by the outlet, into which the delivery-pipe J screws and extends above the top of the cylinder, the side opening thus formed being closed by the cylinder-head O, which has an upturned flange, b, and a recess, b, on the under side, to form a stop for the top of valve E when closing the said throat. The said valve E is dropped into the valve-chamber through the opening closed by the flange b, and is held in place by a pin, d, passing horizontally through its lower part and through the sides of the valve-chamber. It may therefore be easily removed for repairs. This valve is composed of a non-oxidizing metallic plate, 0, having its lower edge grooved to form a bearing for the pin, and covered by leather or other suitable material, 72-, which is folded over said grooved end and riveted or otherwise secured to said plate, thereby covering it on both sides in such a way as to prevent the valve from settling or being contracted in length. The pin d, which is necessary for holding the valve in position only in heavy pumping, may be provided with small rubber washers to prevent leaking and slightly riveted to hold in place. Otherwise the pin may be dispensed with, and the action of the water will be sufficient to operate the valve without it. It will be seen that the said valve is double-acting-in its operation-via, when the water is passing up the side pipe the valve rises from its inclined seat in the chamber and closes the throat d, fitting against the recess in the under side of the cap, and when the water is forced through .the throat d, by the upward lift of the piston the valve falls back on its inclined seat, closing the side pipe below, while the water escapes upward.

G G are inlet-valves in the cylinder-heads, to admit water at each alternate reciprocation of the piston H. The inlet-valve in G is provided with a plate or clamp, which lies across one end of the leather and is secured by screws, which are inserted from the outside in order that they may be more conveniently removed when it is desired to repair the valves. The valve in G is a double valve, circular in form, and secured diametrically to the cross-piece of the cylinder head by a similar clamp and screws. On the outside of these inlet-valves, and attached to the cylinder-heads, are network screens, which efi'ectually prevent stones and sticks from being drawn into the cylinder when the latter is put close to the bottom of the well, or when the water is pumped down in the well until the top of the cylinder is nearly bare.

The piston H is constructed of two circular metal disks, f f, having two intermediate leather disks, 9 g, of larger size, and clamped together by a nut, j, on the end of the pistonrod I, which is reduced in size to form a shoulder or bearing for the upper disk, f, so that by screwing the nut the piston will be held immovably to the piston-rod. The edges of the leather disks are turned over the metal disks, and receive the frictional wear of the cylinder, and being more or less free, they are forced outwardly against the cylinder by the pressure ofthe water and make a tight packing.

The pump-rod K made of half-inch gaspipe, is connected to the piston-rod by a screwcoupling, L, with reduced bores, the pistonrod. passing through the cylinder-head being of less diameter than the pump-rod. The upper end of rod K screws into an oscillator or head, M, which is bifurcated and connected to the lever or operating-handle N by a suitable pin. Screw-ended shanks R, with prongs, are screwed into the pump-post Q, about eight feet apart, and provided with perforated glass balls 0, through which the pump-rod works with but little friction. The said pump-post is made of three by four inch pine scantling, to the lower end of which the cylinder is firmly secured by means of a stirrup-rod, g, which passes around the cylinder and is secured by nuts to a cross-piece, 0, attached to the post. On the top of said post are side plates, P, having flanges on each side for receiving the post, and fastened by a bolt passing through their lower ends and two screws nearer the top of each plate. In grooved bearings in the top of said plates the pins of the handle work. Two caps,p, having corresponding grooves, fit over the pins and are held in place by bolts passing up through flanges on the inside of side plates and secured by nuts. The caps are provided with perforations above the bearings, through which the pins of the handle can be oiled.

The air-chamber T is constructed of two or three inch iron piping out to about twelve inches in length, provided with a close cap, U, screwing on the upper end, and with a cap, V, screwing on the lower end, provided with a screw-orifice to connect with the delivery-pipe J, to which the spout W is connected by a T- coupling. The air-chamber may be dispensed with when the pump is not required to discharge water through a hose screwed to its spout by removing the T-couplin g and screwing the spout by a coupling-joint to the delivery-pipe.

A modified form of gear may be used, which consists of a rock-bar connected to the pumptube, sliding in a frame bolted to the pumppost, and operated by a rook-segment on the end of the handle. An anti-friction roller is journaled to the frame at the back of the rock-bar to lessen frictional contact.

The water is prevented from ever freezing in the delivery-pipe in the following manner: The chamber-valve E receives the main heft of the water in the delivery-pipe in such a way that the water runs back into the cylinder so graduall y that there is not enough pressure against the inlet-valves when the handle of the pump is not in motion to close them, and therefore the water runs out of the cylinder through the inlet-valves until the level of the water in the well is reached.

It will be seen that my pump can be easily adjusted to any desired length or size, as itis put together from bottom to top with bolts and screws, thus reducingqit to such a system of simplicity and cheapness that the most humble farmer will have no difficulty in successfully operating it.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The cylinder A, having cylinder-head 0, provided with screened inlet-valve G, and cylinder-head 0, provided with screened double inlet-valve G, and having flange b and recess 1), substantially as and for the purpose specified.

2. The combination, with the cylinder A and side pipe, B, having valve-chamber D, of the vibrating valve E, having end wise-grooved plate 0, leather covering it, and pin (1, substantially as shown and described, whereby the said valve may be prevented from settling, as set forth.

3. In a pump, the vibrating valve E, having endwise-grooved plate 0,1vather covering h, and pin d, substantially as shown and described, whereby the said valve may be prevented from settling, as set forth.

4. In combination with post Q and lever N, the flanged and grooved side plates, P, and perforated caps 11, substantially as shown and described.

ANDREW J OSLIN HOPKINS.

Witnesses: I

MORGAN JELLETT, J AS. MAOOUN. 

